The former Brookside star, who was skating alongside partner Daniel Whiston to Peggy Lee's 'Fever', performed a 'scorpion kick' manoeuvre which saw her graze her scalp with the blade of her boot.
Ellison went on to complete the routine, for which she and Whiston scored 19 points, their highest tally during the competition so far.
Whiston later explained to host Christine Bleakley: "She's in great hands, she's getting patched up. The good news is she's going to be okay. It was a very scary moment.. when I looked down, her whole hair was just red.
"Everybody cares about her very much, including me. She is a trooper... she wanted to finish that routine and I thought it was her best skate."
Coach Karen Barber added: "It's that moment that emphasises how dangerous ice skating is. The blades are so sharp and the adrenaline tonight went a little bit further."
The show's host Phillip Schofield later provided Twitter followers with an update on Ellison's progress.
"Current news on Jen is that she's ok but in mild shock and feeling a bit sick," he wrote. "It's apparently not a serious injury though, thankfully!"
Dancing on Ice continues on ITV1.